Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba662f979c0bc096…

MALICIOUS

PDF

67.0 KB Created: 2020-12-16 00:43:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: fc17b91ef87d9d2b1e0e18fae518e420 SHA-1: 34e6dc476c718db9e702b394c799dd8eabe92aa6 SHA-256: ba662f979c0bc0969c5c4da634ec18cff0be4fccfdc437efd740b5029bc9c842
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains multiple embedded URLs, with at least one identified as a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, contains text suggesting it is a lure for a PDF file, further supporting a phishing or social engineering attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://cctraff.ru/123?utm_term=geometry+for+enjoyment+and+challenge+pdf+newton In PDF document text
    • https://vasedowazapen.weebly.com/uploads/1/3/4/3/134320052/200b4a05fa.pdfIn PDF document text
    • https://zamosokajuzosa.weebly.com/uploads/1/3/4/6/134651904/47f2296.pdfIn PDF document text
    • https://sakenudawajaka.weebly.com/uploads/1/3/4/5/134595508/190517.pdfIn PDF document text
    • https://varodapomibaga.weebly.com/uploads/1/3/4/8/134874415/buwokesimuwomif.pdfIn PDF document text
    • https://jabuvevakeg.weebly.com/uploads/1/3/4/6/134685488/tinorowamupafogovib.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/jifemesujogapegamagi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14be9066-b363-423e-a6c4-05cbb529ef16/tepetanupepi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc78e901c59a74bd9912fac/t/5fcd0ac4eb18547f4b88f274/1607273156854/zonubemibeped.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7908543c5ee75bf2cebb8/t/5fcdc17ad235d37878e5b3c0/1607319940266/42266141798.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc78eacf59f035d0ccdc26a/t/5fc95465fe8718510dbd1799/1607029861910/wifi_drivers_for_hp_laptop_15-_bs0xx.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/25132254850.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/answers_in_genesis_vbs_2019_music.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/sarcophagus_design_template.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4c24e9955c744b5542bba/t/5fc8021100658720a82242d4/1606943250627/54864457200.pdfIn PDF document text
    • https://s3.amazonaws.com/jirebonudur/18189726324.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f0e230f-fdbb-4a68-886d-8c927feba9b3/21547128796.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c86e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC86E 5692 bytes
SHA-256: 62b99ff4144fe981be17f7686fe02afe07881fa19866321b567a1091fbc0d5d2
font_01_sfnt_off0000dbc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC6 10224 bytes
SHA-256: a6df41b474b7c2af5a147851f07d4433ed8ff3ba561fed67bfe08906f2376fe2

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